Question

pls solve this surface area and volume question class 10​

Answer 1

Answer:

Total surface area of object = 4576cm²

Total price of polishing = Rs 91.52

Answer 2

Answer: Rs.91.48 is the answer

Step-by-step explanation:

radius of the cylinder =r1=7cm

height of the cylinder h(h+2r)=104cm

Curved surface area of cylinder=2πrh

2π*7*h    equation 1

h+2x=104

h=104-2(r)

h=90cm

Now substitute h value in equation 1

Curved surface area of cylinder=2π*7*90

=3948.40cm^2

Curved surface area of 2 hemisphere=2(2πr^2)

=2(2*π*7^2)

615.75cm^3    

Total surface area=Curved surface area of cylinder+ Curved surface area of 2 hemisphere

=3948.40+615.75

=4574.15cm^2

=45.74dm^2

cost of polishing for ldm^2=2

cost of polishing for 45.74dm^2=Rs.2

=45.74 x 2

=Rs.91.48

Hence, we get the cost Rs.91.48